Sink



FIG. 1 is a perspective view thereof;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a side elevational view, the opposite side being a mirror image thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sink, as shown and described. 